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Submission #359955

# Submission time Handle Problem Language Result Execution time Memory
359955 2021-01-27T11:18:42 Z Fischer Biochips (IZhO12_biochips) C++14
100 / 100
 672 ms 406508 KB 
#include <bits/stdc++.h>
using namespace std;

const int maxn = 2e5 + 10;
int dp[maxn][510];
vector<int> g[maxn];
int c[maxn];
int sz[maxn];
int n, m;
void dfs(int x) {
	sz[x] = 0;
	for (int i = 1; i <= m; ++i) dp[x][i] = -1e9;
	for (int v : g[x]) {
		dfs(v);
		for (int i = min(m, sz[x]+sz[v]); i >= 1; --i) {
			for (int j = max(1, i-sz[x]); j <= min(i, sz[v]); ++j) {
				dp[x][i] = max(dp[x][i], dp[x][i-j] + dp[v][j]);
			}
		}
		sz[x] += sz[v];
	}
	sz[x] += 1;
	dp[x][1] = max(dp[x][1], c[x]);
}

int main() {
	cin >> n >> m;
	int root = 0;
	for (int i = 1; i <= n; ++i) {
		int pi;
		cin >> pi >> c[i];
		if (pi == 0) root = i;
		else g[pi].push_back(i);
	}
	dfs(root);
	cout << dp[root][m] << endl;
	return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5228 KB Output is correct
4 Correct 25 ms 23160 KB Output is correct
5 Correct 24 ms 25324 KB Output is correct
6 Correct 24 ms 25324 KB Output is correct
7 Correct 420 ms 303436 KB Output is correct
8 Correct 414 ms 303340 KB Output is correct
9 Correct 561 ms 368364 KB Output is correct
10 Correct 672 ms 406508 KB Output is correct